2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2018, Matthew Macy
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/types.h>
32 #include <sys/errno.h>
33 #include <sys/sysctl.h>
40 #include <libpmcstat.h>
41 #include "pmu-events/pmu-events.h"
43 #if defined(__amd64__)
48 static struct pmu_alias pmu_alias_table[] = {
49 { "UNHALTED_CORE_CYCLES", "CPU_CLK_UNHALTED.THREAD_P_ANY"},
50 { "UNHALTED-CORE-CYCLES", "CPU_CLK_UNHALTED.THREAD_P_ANY"},
51 { "LLC_MISSES", "LONGEST_LAT_CACHE.MISS"},
52 { "LLC-MISSES", "LONGEST_LAT_CACHE.MISS"},
53 { "LLC_REFERENCE", "LONGEST_LAT_CACHE.REFERENCE"},
54 { "LLC-REFERENCE", "LONGEST_LAT_CACHE.REFERENCE"},
55 { "LLC_MISS_RHITM", "mem_load_l3_miss_retired.remote_hitm"},
56 { "LLC-MISS-RHITM", "mem_load_l3_miss_retired.remote_hitm"},
57 { "RESOURCE_STALL", "RESOURCE_STALLS.ANY"},
58 { "RESOURCE_STALLS_ANY", "RESOURCE_STALLS.ANY"},
59 { "BRANCH_INSTRUCTION_RETIRED", "BR_INST_RETIRED.ALL_BRANCHES"},
60 { "BRANCH-INSTRUCTION-RETIRED", "BR_INST_RETIRED.ALL_BRANCHES"},
61 { "BRANCH_MISSES_RETIRED", "BR_MISP_RETIRED.ALL_BRANCHES"},
62 { "BRANCH-MISSES-RETIRED", "BR_MISP_RETIRED.ALL_BRANCHES"},
67 pmu_alias_get(const char *name)
71 for (pa = pmu_alias_table; pa->pa_alias != NULL; pa++)
72 if (strcasecmp(name, pa->pa_alias) == 0)
77 struct pmu_event_desc {
83 static const struct pmu_events_map *
84 pmu_events_map_get(void)
88 const struct pmu_events_map *pme;
90 if (sysctlbyname("kern.hwpmc.cpuid", (void *)NULL, &s,
91 (void *)NULL, 0) == -1)
93 if (sysctlbyname("kern.hwpmc.cpuid", buf, &s,
94 (void *)NULL, 0) == -1)
96 for (pme = pmu_events_map; pme->cpuid != NULL; pme++)
97 if (strcmp(buf, pme->cpuid) == 0)
102 static const struct pmu_event *
103 pmu_event_get(const char *event_name)
105 const struct pmu_events_map *pme;
106 const struct pmu_event *pe;
108 if ((pme = pmu_events_map_get()) == NULL)
110 for (pe = pme->table; pe->name || pe->desc || pe->event; pe++) {
111 if (pe->name == NULL)
113 if (strcasecmp(pe->name, event_name) == 0)
120 pmu_parse_event(struct pmu_event_desc *ped, const char *eventin)
123 char *kvp, *key, *value;
125 if ((event = strdup(eventin)) == NULL)
127 bzero(ped, sizeof(*ped));
128 while ((kvp = strsep(&event, ",")) != NULL) {
129 key = strsep(&kvp, "=");
133 if (strcmp(key, "umask") == 0)
134 ped->ped_umask = strtol(value, NULL, 16);
135 if (strcmp(key, "event") == 0)
136 ped->ped_event = strtol(value, NULL, 16);
137 if (strcmp(key, "period") == 0)
138 ped->ped_period = strtol(value, NULL, 10);
145 pmcstat_pmu_sample_rate_get(const char *event_name)
147 const struct pmu_event *pe;
148 struct pmu_event_desc ped;
150 event_name = pmu_alias_get(event_name);
151 if ((pe = pmu_event_get(event_name)) == NULL)
152 return (DEFAULT_SAMPLE_COUNT);
153 if (pe->alias && (pe = pmu_event_get(pe->alias)) == NULL)
154 return (DEFAULT_SAMPLE_COUNT);
155 if (pe->event == NULL)
156 return (DEFAULT_SAMPLE_COUNT);
157 if (pmu_parse_event(&ped, pe->event))
158 return (DEFAULT_SAMPLE_COUNT);
159 return (ped.ped_period);
163 uint64_t pmcstat_pmu_sample_rate_get(const char *event_name __unused) { return (DEFAULT_SAMPLE_COUNT); }